<template>
	<view class="container">
		<!-- 空白页 -->
		<view v-if="!hasLogin || empty===true" class="empty">
			<image src="/static/emptyCart.jpg" mode="aspectFit"></image>
			<view v-if="hasLogin" class="empty-tips">
				空空如也
				<navigator class="navigator" v-if="hasLogin" url="../index/index" open-type="switchTab">随便逛逛>
				</navigator>
			</view>
			<view v-else class="empty-tips">
				空空如也
				<view class="navigator" @click="navToLogin">去登陆></view>
			</view>
		</view>
		<view v-else>
			<!-- 列表 -->
			<view class="cart-list">
				<block v-for="(item, index) in cartList" :key="index">
					<view class="cart-item" :class="{'b-b': index!==cartList.length-1}">
						<view class="image-wrapper">
							<image :src="item.img" :class="[item.loaded]" mode="aspectFill" lazy-load
								@load="onImageLoad('cartList', index)" @error="onImageError('cartList', index)"></image>
							<view class="yticon icon-xuanzhong2 checkbox" :class="{checked: item.checked}"
								@click="check('item', index)"></view>
						</view>
						<view class="item-right">
							<text class="clamp title">{{item.title}}</text>
							<text class="attr">{{item.attr_val}}</text>
							<text class="price">¥{{item.mallprice}}</text>
							<uni-number-box class="step" :min="1" :max="9999" :value="item.qty>9999?9999:item.qty"
								:isMax="item.qty>=9999?true:false" :isMin="item.qty==1" :index="index"
								@eventChange="numberChange"></uni-number-box>
						</view>
						<text class="del-btn yticon icon-fork" @click="deleteCartItem(item,index)"></text>
					</view>
				</block>
			</view>
			<!-- 底部菜单栏 -->
			<view class="action-section">
				<view class="checkbox">
					<image :src="allChecked?'/static/selected.png':'/static/select.png'" mode="aspectFit"
						@click="check('all')"></image>
					<view class="clear-btn" :class="{show: allChecked}" @click="clearCart">
						清空
					</view>
				</view>
				<view class="total-box">
					<text class="price">¥{{total.toFixed(2)}}</text>
					<!-- <text class="coupon">
						已优惠
						<text>74.35</text>
						元
					</text> -->
				</view>
				<button type="primary" class="no-border confirm-btn" @click="createOrder">去结算</button>
			</view>
		</view>
	</view>
</template>

<script>
	import {
		mapState
	} from 'vuex';
	import uniNumberBox from '@/components/uni-number-box.vue'
	export default {
		components: {
			uniNumberBox
		},
		data() {
			return {
				total: 0, //总价格
				allChecked: true, //全选状态  true|false
				empty: false, //空白页现实  true|false
				cartList: [],
				hasLogin: 0,
			};
		},
		onLoad() {
			let id = uni.getStorageSync('LoginID');
			this.hasLogin = id;
			this.$corpid = uni.getStorageSync('corpid');
			this.$Url = uni.getStorageSync('URL');

		},
		onShow() {
			let token = uni.getStorageSync('Token'); //Token值
			uni.request({
				url: this.$Url + 'sale/CheckTokenLogin',
				data: '',
				method: 'POST',
				header: {
					'token': token,
					'cookie': uni.getStorageSync('Cookies'),
				},
				success: (res) => {
					console.log(res);
					let id = uni.getStorageSync('LoginID');
					if (res.data.msg == 'success' && id == 1) {
						let hostid = uni.getStorageSync('hostid'); //当前服务器id
						let oldHostid = uni.getStorageSync('Oldhostid'); //上一次服务器id
						if (hostid == oldHostid || oldHostid == '') {
							this.empty = false;
							this.loadData();
						} else {
							this.hasLogin = 0;
							uni.setStorageSync('Oldhostid', hostid)
						}
					} else {
						this.empty = true;
						this.hasLogin = 0;
					}
				},
				fail: (error) => {
					console.log(error);
				}
			})
		},
		watch: {
			//显示空白页
			cartList(e) {
				let empty = e.length === 0 ? true : false;
				if (this.empty !== empty) {
					this.empty = empty;
				}
			}
		},
		computed: {
			// ...mapState(['hasLogin'])
		},
		methods: {
			//请求数据
			async loadData() {
				this.cartList = [];
				this.$util.util('order/GetShopCart', {
					corpid: this.$corpid
				}, 'POST').then(res => {
					for(let i=0;i<res.length;i++){
						res[i].checked=true;
					}
					this.cartList = res;
					let shopCart = [];
					for (let i = 0; i < res.length; i++) {
						let data = {
							corpid: this.$corpid,
							goodsid: res[i].id,
							qty: res[i].qty,
							price: res[i].price
						}
						shopCart.push(data);
					}
					uni.setStorageSync('shopCart', JSON.stringify(shopCart));
					res.forEach(item => {
						this.$set(item, 'loaded', 'loaded');
					})
					this.calcTotal(); //计算总价/
				})
			},
			//监听image加载完成
			onImageLoad(key, index) {
				this.$set(this[key][index], 'loaded', 'loaded');
			},
			//监听image加载失败
			onImageError(key, index) {
				this[key][index].image = '/static/errorImage.jpg';
			},
			navToLogin() {
				uni.navigateTo({
					url: '/pages/public/login'
				})
			},
			//选中状态处理
			check(type, index) {
				if (type === 'item') {
					this.cartList[index].checked = !this.cartList[index].checked;
				} else {
					const checked = !this.allChecked;
					const list = this.cartList;
					list.forEach(item => {
						item.checked = checked;
					})
					this.allChecked = checked;
				}
				this.calcTotal(type);
			},
			//修改数量
			numberChange(data) {
				let list = this.cartList[data.index];
				console.log(list)
				this.$util.util('order/UpCart', {
					corpid: this.$corpid,
					goodsid: list.id,
					qty: data.number
				}, 'POST').then(res => {
					console.log(res);
					// this.loadData();
					list.qty = res;
					// this.calcTotal();
					this.loadData();
				})
			},
			//删除商品
			deleteCartItem(item, index) {
				uni.showLoading({
					title: '加载中',
				})
				this.$util.util('order/DelCartGoods', {
					corpid: this.$corpid,
					FEntryID: item.entryid
				}, 'POST').then(res => {
					this.$api.msg(res.msg);
					this.loadData();
					uni.hideLoading();
				})
			},
			//清空
			clearCart() {
				this.$util.util('order/DelCart', {
					corpid: this.$corpid
				}, 'POST').then(res => {
					this.$api.msg('清空购物车成功');
					this.cartList = [];
				});
			},
			//计算总价
			calcTotal() {
				let list = this.cartList;
				if (list.length === 0) {
					this.empty = true;
					return;
				}
				console.log('calcTotal', list);
				let total = 0;
				let checked = true;
				list.forEach(item => {
					if (item.checked === true) {
						total += item.price * item.qty;
					} else if (checked === true) {
						checked = false;
					}
				})
				this.allChecked = checked;
				this.total = Number(total.toFixed(2));
			},
			//创建订单
			createOrder() {
				let list = this.cartList;
				let goodsData = [];
				list.forEach(item => {
					if (item.checked) {
						goodsData.push(item)
					}
				})
				uni.navigateTo({
					url: `/pages/order/createOrder?data=${JSON.stringify({goodsData: goodsData,})}&id=0`
				})
				this.$api.msg('跳转到订单页面');
			}
		}
	}
</script>

<style lang='scss'>
	.container {
		padding-bottom: 134upx;

		/* 空白页 */
		.empty {
			position: fixed;
			left: 0;
			top: 0;
			width: 100%;
			height: 100vh;
			padding-bottom: 100upx;
			display: flex;
			justify-content: center;
			flex-direction: column;
			align-items: center;
			background: #fff;

			image {
				width: 240upx;
				height: 160upx;
				margin-bottom: 30upx;
			}

			.empty-tips {
				display: flex;
				font-size: $font-sm+2upx;
				color: $font-color-disabled;

				.navigator {
					color: $uni-color-primary;
					margin-left: 16upx;
				}
			}
		}
	}

	/* 购物车列表项 */
	.cart-item {
		display: flex;
		position: relative;
		padding: 30upx 40upx;

		.image-wrapper {
			width: 230upx;
			height: 230upx;
			flex-shrink: 0;
			position: relative;

			image {
				border-radius: 8upx;
			}
		}

		.checkbox {
			position: absolute;
			left: -16upx;
			top: -16upx;
			z-index: 8;
			font-size: 44upx;
			line-height: 1;
			padding: 4upx;
			color: $font-color-disabled;
			background: #fff;
			border-radius: 50px;
		}

		.item-right {
			display: flex;
			flex-direction: column;
			flex: 1;
			overflow: hidden;
			position: relative;
			padding-left: 30upx;

			.title,
			.price {
				font-size: $font-base + 2upx;
				color: $font-color-dark;
				height: 40upx;
				line-height: 40upx;
			}

			.attr {
				font-size: $font-sm + 2upx;
				color: $font-color-light;
				height: 50upx;
				line-height: 50upx;
			}

			.price {
				height: 50upx;
				line-height: 50upx;
			}
		}

		.del-btn {
			padding: 4upx 10upx;
			font-size: 34upx;
			height: 50upx;
			color: $font-color-light;
		}
	}

	/* 底部栏 */
	.action-section {
		/* #ifdef H5 */
		margin-bottom: 100upx;
		/* #endif */
		position: fixed;
		left: 30upx;
		bottom: 30upx;
		z-index: 95;
		display: flex;
		align-items: center;
		width: 690upx;
		height: 100upx;
		padding: 0 30upx;
		background: rgba(255, 255, 255, .9);
		box-shadow: 0 0 20upx 0 rgba(0, 0, 0, .5);
		border-radius: 16upx;

		.checkbox {
			height: 52upx;
			position: relative;

			image {
				width: 52upx;
				height: 100%;
				position: relative;
				z-index: 5;
			}
		}

		.clear-btn {
			position: absolute;
			left: 26upx;
			top: 0;
			z-index: 4;
			width: 0;
			height: 52upx;
			line-height: 52upx;
			padding-left: 38upx;
			font-size: $font-base;
			color: #fff;
			background: $font-color-disabled;
			border-radius: 0 50px 50px 0;
			opacity: 0;
			transition: .2s;

			&.show {
				opacity: 1;
				width: 120upx;
			}
		}

		.total-box {
			flex: 1;
			display: flex;
			flex-direction: column;
			text-align: right;
			padding-right: 40upx;

			.price {
				font-size: $font-lg;
				color: $font-color-dark;
			}

			.coupon {
				font-size: $font-sm;
				color: $font-color-light;

				text {
					color: $font-color-dark;
				}
			}
		}

		.confirm-btn {
			padding: 0 42upx;
			margin: 0;
			border-radius: 100px;
			height: 76upx;
			line-height: 76upx;
			font-size: $font-base + 2upx;
			background: $uni-color-primary;
			box-shadow: 1px 2px 5px rgba(217, 60, 93, 0.72)
		}
	}

	/* 复选框选中状态 */
	.action-section .checkbox.checked,
	.cart-item .checkbox.checked {
		color: $uni-color-primary;
	}
</style>
